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1 | /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ |
2 | /* | |
3 | * viking | |
a482007a | 4 | * Copyright (C) 2009, Guilhem Bonnefille <guilhem.bonnefille@gmail.com> |
e3a90009 GB |
5 | * |
6 | * viking is free software: you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * viking is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
14 | * See the GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
dfc4db8b GB |
19 | |
20 | /** | |
21 | * SECTION:vikslippymapsource | |
22 | * @short_description: the class for SlippyMap oriented map sources | |
23 | * | |
24 | * The #VikSlippyMapSource class handles slippy map oriented map sources. | |
25 | * The related service is tile oriented, à la Google. | |
26 | * | |
27 | * The tiles are in 'google spherical mercator', which is | |
28 | * basically a mercator projection that assumes a spherical earth. | |
29 | * http://docs.openlayers.org/library/spherical_mercator.html | |
30 | * | |
31 | * Such service is also a type of TMS (Tile Map Service) as defined in | |
32 | * OSGeo's wiki. | |
33 | * http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification | |
34 | * But take care that the Y axis is inverted, ie the origin is at top-left | |
35 | * corner. | |
36 | * Following this specification, the protocol handled by this class | |
37 | * follows the global-mercator profile. | |
38 | * | |
39 | * You can also find many interesting information on the OSM's wiki. | |
40 | * http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames | |
41 | * http://wiki.openstreetmap.org/wiki/Setting_up_TMS | |
42 | */ | |
43 | ||
e3a90009 GB |
44 | #ifdef HAVE_CONFIG_H |
45 | #include "config.h" | |
46 | #endif | |
47 | ||
48 | #ifdef HAVE_MATH_H | |
49 | #include <math.h> | |
50 | #endif | |
51 | ||
52 | #include "globals.h" | |
8eb12ac6 | 53 | #include "vikslippymapsource.h" |
e1dde2a6 | 54 | #include "maputils.h" |
e3a90009 GB |
55 | |
56 | static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ); | |
57 | static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ); | |
f66ea3ec | 58 | |
2673b29d | 59 | static gboolean _is_direct_file_access (VikMapSource *self ); |
c81ded98 | 60 | static gboolean _supports_download_only_new (VikMapSource *self ); |
e3a90009 | 61 | |
f66ea3ec GB |
62 | static gchar *_get_uri( VikMapSourceDefault *self, MapCoord *src ); |
63 | static gchar *_get_hostname( VikMapSourceDefault *self ); | |
64 | static DownloadMapOptions *_get_download_options( VikMapSourceDefault *self ); | |
e3a90009 | 65 | |
8eb12ac6 GB |
66 | typedef struct _VikSlippyMapSourcePrivate VikSlippyMapSourcePrivate; |
67 | struct _VikSlippyMapSourcePrivate | |
68 | { | |
69 | gchar *hostname; | |
70 | gchar *url; | |
b529dc9c | 71 | DownloadMapOptions options; |
2673b29d | 72 | gboolean is_direct_file_access; |
8eb12ac6 GB |
73 | }; |
74 | ||
75 | #define VIK_SLIPPY_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_SLIPPY_MAP_SOURCE, VikSlippyMapSourcePrivate)) | |
76 | ||
4e53f3dc GB |
77 | /* properties */ |
78 | enum | |
79 | { | |
80 | PROP_0, | |
81 | ||
82 | PROP_HOSTNAME, | |
83 | PROP_URL, | |
c395c6a5 GB |
84 | PROP_REFERER, |
85 | PROP_FOLLOW_LOCATION, | |
0f08bd0d | 86 | PROP_CHECK_FILE_SERVER_TIME, |
05dbd9ba | 87 | PROP_USE_ETAG, |
2673b29d | 88 | PROP_IS_DIRECT_FILE_ACCESS, |
4e53f3dc GB |
89 | }; |
90 | ||
f6411015 | 91 | G_DEFINE_TYPE (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT); |
e3a90009 GB |
92 | |
93 | static void | |
3a84e537 | 94 | vik_slippy_map_source_init (VikSlippyMapSource *self) |
e3a90009 | 95 | { |
9cca9d93 GB |
96 | /* initialize the object here */ |
97 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
98 | ||
99 | priv->hostname = NULL; | |
100 | priv->url = NULL; | |
c395c6a5 GB |
101 | priv->options.referer = NULL; |
102 | priv->options.follow_location = 0; | |
103 | priv->options.check_file = a_check_map_file; | |
6693f5f9 | 104 | priv->options.check_file_server_time = FALSE; |
2673b29d RN |
105 | priv->options.use_etag = FALSE; |
106 | priv->is_direct_file_access = FALSE; | |
9cca9d93 GB |
107 | |
108 | g_object_set (G_OBJECT (self), | |
109 | "tilesize-x", 256, | |
110 | "tilesize-y", 256, | |
111 | "drawmode", VIK_VIEWPORT_DRAWMODE_MERCATOR, | |
112 | NULL); | |
e3a90009 GB |
113 | } |
114 | ||
115 | static void | |
8eb12ac6 | 116 | vik_slippy_map_source_finalize (GObject *object) |
e3a90009 | 117 | { |
9cca9d93 GB |
118 | VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); |
119 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
120 | ||
121 | g_free (priv->hostname); | |
122 | priv->hostname = NULL; | |
123 | g_free (priv->url); | |
124 | priv->url = NULL; | |
c395c6a5 GB |
125 | g_free (priv->options.referer); |
126 | priv->options.referer = NULL; | |
e3a90009 | 127 | |
9cca9d93 | 128 | G_OBJECT_CLASS (vik_slippy_map_source_parent_class)->finalize (object); |
e3a90009 GB |
129 | } |
130 | ||
4e53f3dc GB |
131 | static void |
132 | vik_slippy_map_source_set_property (GObject *object, | |
133 | guint property_id, | |
134 | const GValue *value, | |
135 | GParamSpec *pspec) | |
136 | { | |
137 | VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); | |
138 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
139 | ||
140 | switch (property_id) | |
141 | { | |
142 | case PROP_HOSTNAME: | |
143 | g_free (priv->hostname); | |
144 | priv->hostname = g_value_dup_string (value); | |
145 | break; | |
146 | ||
147 | case PROP_URL: | |
148 | g_free (priv->url); | |
149 | priv->url = g_value_dup_string (value); | |
150 | break; | |
151 | ||
c395c6a5 GB |
152 | case PROP_REFERER: |
153 | g_free (priv->options.referer); | |
154 | priv->options.referer = g_value_dup_string (value); | |
155 | break; | |
156 | ||
157 | case PROP_FOLLOW_LOCATION: | |
158 | priv->options.follow_location = g_value_get_long (value); | |
159 | break; | |
160 | ||
0f08bd0d | 161 | case PROP_CHECK_FILE_SERVER_TIME: |
6693f5f9 | 162 | priv->options.check_file_server_time = g_value_get_boolean (value); |
0f08bd0d GB |
163 | break; |
164 | ||
05dbd9ba JJ |
165 | case PROP_USE_ETAG: |
166 | priv->options.use_etag = g_value_get_boolean (value); | |
167 | break; | |
168 | ||
2673b29d RN |
169 | case PROP_IS_DIRECT_FILE_ACCESS: |
170 | priv->is_direct_file_access = g_value_get_boolean (value); | |
171 | break; | |
172 | ||
4e53f3dc GB |
173 | default: |
174 | /* We don't have any other property... */ | |
175 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
176 | break; | |
177 | } | |
178 | } | |
179 | ||
180 | static void | |
181 | vik_slippy_map_source_get_property (GObject *object, | |
182 | guint property_id, | |
183 | GValue *value, | |
184 | GParamSpec *pspec) | |
185 | { | |
186 | VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); | |
187 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
188 | ||
189 | switch (property_id) | |
190 | { | |
191 | case PROP_HOSTNAME: | |
192 | g_value_set_string (value, priv->hostname); | |
193 | break; | |
194 | ||
195 | case PROP_URL: | |
196 | g_value_set_string (value, priv->url); | |
197 | break; | |
198 | ||
c395c6a5 GB |
199 | case PROP_REFERER: |
200 | g_value_set_string (value, priv->options.referer); | |
201 | break; | |
202 | ||
203 | case PROP_FOLLOW_LOCATION: | |
204 | g_value_set_long (value, priv->options.follow_location); | |
205 | break; | |
206 | ||
0f08bd0d | 207 | case PROP_CHECK_FILE_SERVER_TIME: |
6693f5f9 | 208 | g_value_set_boolean (value, priv->options.check_file_server_time); |
0f08bd0d GB |
209 | break; |
210 | ||
05dbd9ba JJ |
211 | case PROP_USE_ETAG: |
212 | g_value_set_boolean (value, priv->options.use_etag); | |
213 | break; | |
214 | ||
2673b29d RN |
215 | case PROP_IS_DIRECT_FILE_ACCESS: |
216 | g_value_set_boolean (value, priv->is_direct_file_access); | |
217 | break; | |
218 | ||
4e53f3dc GB |
219 | default: |
220 | /* We don't have any other property... */ | |
221 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
222 | break; | |
223 | } | |
224 | } | |
225 | ||
e3a90009 | 226 | static void |
8eb12ac6 | 227 | vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass) |
e3a90009 GB |
228 | { |
229 | GObjectClass* object_class = G_OBJECT_CLASS (klass); | |
de674329 | 230 | VikMapSourceClass* grandparent_class = VIK_MAP_SOURCE_CLASS (klass); |
f66ea3ec | 231 | VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass); |
4e53f3dc GB |
232 | GParamSpec *pspec = NULL; |
233 | ||
234 | object_class->set_property = vik_slippy_map_source_set_property; | |
235 | object_class->get_property = vik_slippy_map_source_get_property; | |
e3a90009 GB |
236 | |
237 | /* Overiding methods */ | |
de674329 RN |
238 | grandparent_class->coord_to_mapcoord = _coord_to_mapcoord; |
239 | grandparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord; | |
2673b29d | 240 | grandparent_class->is_direct_file_access = _is_direct_file_access; |
de674329 | 241 | grandparent_class->supports_download_only_new = _supports_download_only_new; |
f66ea3ec GB |
242 | |
243 | parent_class->get_uri = _get_uri; | |
244 | parent_class->get_hostname = _get_hostname; | |
245 | parent_class->get_download_options = _get_download_options; | |
4e53f3dc GB |
246 | |
247 | pspec = g_param_spec_string ("hostname", | |
248 | "Hostname", | |
249 | "The hostname of the map server", | |
250 | "<no-set>" /* default value */, | |
9f58c4b4 | 251 | G_PARAM_READWRITE); |
4e53f3dc GB |
252 | g_object_class_install_property (object_class, PROP_HOSTNAME, pspec); |
253 | ||
254 | pspec = g_param_spec_string ("url", | |
255 | "URL", | |
256 | "The template of the tiles' URL", | |
257 | "<no-set>" /* default value */, | |
9f58c4b4 | 258 | G_PARAM_READWRITE); |
4e53f3dc | 259 | g_object_class_install_property (object_class, PROP_URL, pspec); |
c395c6a5 GB |
260 | |
261 | pspec = g_param_spec_string ("referer", | |
262 | "Referer", | |
263 | "The REFERER string to use in HTTP request", | |
264 | NULL /* default value */, | |
265 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
266 | g_object_class_install_property (object_class, PROP_REFERER, pspec); | |
8eb12ac6 | 267 | |
c395c6a5 GB |
268 | pspec = g_param_spec_long ("follow-location", |
269 | "Follow location", | |
270 | "Specifies the number of retries to follow a redirect while downloading a page", | |
271 | 0 /* minimum value */, | |
272 | G_MAXLONG /* maximum value */, | |
273 | 0 /* default value */, | |
274 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
275 | g_object_class_install_property (object_class, PROP_FOLLOW_LOCATION, pspec); | |
0f08bd0d | 276 | |
6693f5f9 GB |
277 | pspec = g_param_spec_boolean ("check-file-server-time", |
278 | "Check file server time", | |
279 | "Age of current cache before redownloading tile", | |
280 | FALSE /* default value */, | |
281 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
0f08bd0d | 282 | g_object_class_install_property (object_class, PROP_CHECK_FILE_SERVER_TIME, pspec); |
c395c6a5 | 283 | |
05dbd9ba JJ |
284 | pspec = g_param_spec_boolean ("use-etag", |
285 | "Use etag values with server", | |
286 | "Store etag in a file, and send it to server to check if we have the latest file", | |
287 | FALSE /* default value */, | |
288 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
289 | g_object_class_install_property (object_class, PROP_USE_ETAG, pspec); | |
290 | ||
2673b29d RN |
291 | pspec = g_param_spec_boolean ("use-direct-file-access", |
292 | "Use direct file access", | |
293 | "Use direct file access to OSM like tile images - no need for a webservice", | |
294 | FALSE /* default value */, | |
295 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
296 | g_object_class_install_property (object_class, PROP_IS_DIRECT_FILE_ACCESS, pspec); | |
297 | ||
8eb12ac6 GB |
298 | g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate)); |
299 | ||
300 | object_class->finalize = vik_slippy_map_source_finalize; | |
e3a90009 GB |
301 | } |
302 | ||
2673b29d RN |
303 | gboolean |
304 | _is_direct_file_access (VikMapSource *self) | |
305 | { | |
306 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE); | |
307 | ||
308 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); | |
309 | ||
310 | return priv->is_direct_file_access; | |
311 | } | |
312 | ||
0f08bd0d | 313 | gboolean |
c81ded98 | 314 | _supports_download_only_new (VikMapSource *self) |
0f08bd0d | 315 | { |
c81ded98 | 316 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE); |
0f08bd0d | 317 | |
c81ded98 | 318 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); |
0f08bd0d | 319 | |
c81ded98 | 320 | return priv->options.check_file_server_time || priv->options.use_etag; |
0f08bd0d | 321 | } |
f66ea3ec | 322 | |
e3a90009 GB |
323 | static gboolean |
324 | _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) | |
325 | { | |
326 | g_assert ( src->mode == VIK_COORD_LATLON ); | |
327 | ||
328 | if ( xzoom != yzoom ) | |
329 | return FALSE; | |
330 | ||
e1dde2a6 | 331 | dest->scale = map_utils_mpp_to_scale ( xzoom ); |
e3a90009 GB |
332 | if ( dest->scale == 255 ) |
333 | return FALSE; | |
334 | ||
e1dde2a6 RN |
335 | dest->x = (src->east_west + 180) / 360 * VIK_GZ(17) / xzoom; |
336 | dest->y = (180 - MERCLAT(src->north_south)) / 360 * VIK_GZ(17) / xzoom; | |
e3a90009 GB |
337 | dest->z = 0; |
338 | ||
339 | return TRUE; | |
340 | } | |
341 | ||
342 | static void | |
343 | _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ) | |
344 | { | |
d1302dec JJ |
345 | gdouble socalled_mpp; |
346 | if (src->scale >= 0) | |
e1dde2a6 | 347 | socalled_mpp = VIK_GZ(src->scale); |
d1302dec | 348 | else |
e1dde2a6 | 349 | socalled_mpp = 1.0/VIK_GZ(-src->scale); |
e3a90009 | 350 | dest->mode = VIK_COORD_LATLON; |
e1dde2a6 RN |
351 | dest->east_west = ((src->x+0.5) / VIK_GZ(17) * socalled_mpp * 360) - 180; |
352 | dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / VIK_GZ(17) * socalled_mpp * 360)); | |
e3a90009 GB |
353 | } |
354 | ||
8eb12ac6 | 355 | static gchar * |
f66ea3ec | 356 | _get_uri( VikMapSourceDefault *self, MapCoord *src ) |
8eb12ac6 GB |
357 | { |
358 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
359 | ||
360 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); | |
361 | gchar *uri = g_strdup_printf (priv->url, 17 - src->scale, src->x, src->y); | |
362 | return uri; | |
363 | } | |
364 | ||
365 | static gchar * | |
f66ea3ec | 366 | _get_hostname( VikMapSourceDefault *self ) |
8eb12ac6 GB |
367 | { |
368 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
369 | ||
370 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); | |
371 | return g_strdup( priv->hostname ); | |
372 | } | |
373 | ||
b529dc9c | 374 | static DownloadMapOptions * |
f66ea3ec | 375 | _get_download_options( VikMapSourceDefault *self ) |
8eb12ac6 GB |
376 | { |
377 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
378 | ||
c395c6a5 GB |
379 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); |
380 | return &(priv->options); | |
8eb12ac6 GB |
381 | } |
382 | ||
383 | VikSlippyMapSource * | |
db03733a | 384 | vik_slippy_map_source_new_with_id (guint8 id, const gchar *label, const gchar *hostname, const gchar *url) |
8eb12ac6 | 385 | { |
4e53f3dc | 386 | return g_object_new(VIK_TYPE_SLIPPY_MAP_SOURCE, |
db03733a | 387 | "id", id, "label", label, "hostname", hostname, "url", url, NULL); |
c395c6a5 | 388 | } |